This set of Video Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Closed Circuit Television (CCTV) and Community Antenna or Access Television (CATV)”.
1. What is the full form of CCTV?
a) Closed Circuit Television
b) Circuit Capacitor Television
c) Community Circuit Television
d) Closed Capacitor Telephone
View Answer
Explanation: CCTV stands for Closed Circuit Television. CCTV is also known as video surveillance system. As the name suggests it is mostly used for closed circuit monitoring using television or monitor. The main advantage with CCTV system is that it is used for many applications like privacy, security, crime investigation etc.
2. In which country was the first CCTV system introduced?
a) India
b) China
c) Germany
d) USA
View Answer
Explanation: First CCTV system was introduced by Siemens AG at test stand VII in Peenemunde, Germany in 1942. The earliest video surveillance systems involved constant monitoring because there was no way to record and store information. Later the systems evolved which used magnetic tapes for recording.
3. Which of the following system is shown in the below figure?
a) Digital TV
b) DTT
c) CATV
d) CCTV
View Answer
Explanation: The block diagram of CCTV system is shown in the figure. It consists of a number of cameras, connected to the central location using cables. This central location may consist of a monitor and switcher for readily viewing the scenes captured by the cameras and switching the cameras as per requirement. The central location also has facility for storing the televised contents, for retrieval and reviewing in future.
4. What is the full form of CATV?
a) Community Antenna Television
b) Closed Antenna Telephone
c) Circuit Antenna Television
d) Circuit Access Telephone
View Answer
Explanation: CATV stands for Community Antenna/Access Television. CATV is also known as cable television. In this type of television system, signals are transmitted through coaxial cables and fiber optic cables. CATV has two standards, older one is analog and newer is digital.
5. Which is the control center in a cable television system where various signals are brought together and monitored before being introduced in to the cable network?
a) RF amplifier
b) Frontend
c) Distribution hub
d) Headend
View Answer
Explanation: In the channel distribution in CATV at headend each television channel is translated into different frequency and sent to the distribution hub from where it may reach the subscriber using the optical or co-axial cable network. The headend is the control center in a cable television system where various signals are brought together and monitored before being introduced in to the cable network.
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